Maintenance Free Batteries (MF)

Features & Benefits

    • Built in hydrometer (most batteries) – Indicates state of charge.
    • Factory-sealed – Makes these batteries maintenance free.
    • Polypropylene case – Reinforced design is precisely tailored to support the battery elements to withstand road shock and vibration. This strong durable material combines light weight with high impact strength.
    • Liquid-gas separator area – Returns liquid to reservoir for longer life.
    • Integrated or rope handle – For ease of transport and installation.
    • Flame arrester – Safety system, prevents explosion from sparks outside the battery, minimizes acid leakage, prevents inflow of dust.
    • Heat sealed covers – Helps prevent electrolyte contamination and increase case strength.
    • Centered cast on plate strap – Stronger than thinner gas-burned conventional connectors.
    • Low resistance envelope separators – Encapsulated negative plates help to prevent shorting / treeing between negative and positive plates as well as aid vibration durability.
    • Increased battery shelf life - Compared to conventional batteries, up to 12 months shelf life without charging due to the use of calcium / calcium grids.


    Wet batteries have a Lead-Calcium (Ca) positive and Lead-Calcium (Ca) negative plate chemistry or formulation. The non-sealed versions are recommended for use in hot climates, so lost water can be replaced. The advantages Lead Calcium  batteries are :

    • Less preventive maintenance due to less water loss.
    • Reduced terminal corrosion and ventilation.
    • Smaller self-discharge rate.
    • More forgiving when accidentally overcharged.

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